Gemstone



FIG. 1 is a top plan view of a gemstone in accordance with my new design, the dashed lines 4--4 not comprising part of the design and only being used to indicate a surface thereof;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof, the left side elevational view being a mirror image thereof; and,

FIG. 4 is an elevational view taken in a direction perpendicular to the dashed line 4--4. 

The ornamental design for a gemstone, as shown and described. 